| 摘要 |
PURPOSE:To prevent lowering of binding force with a copper foil at a high temperature by directly jointing a film of polyimide able flowable at a high temperature and constituting of a repeating unit expressed by a specific formula with the copper foil with no adhesive agent. CONSTITUTION:A film of polyimide flowable at a high temperature and consisting of a repeating unit expressed by a formula is directly jointed with a copper foil with no adhesive agent. Here, in the formula, R expresses a radical of quadrivalence selected from a group consisting of a fat group radical, a ring fat group radical, a monocyclic aromatic group radical, a contraction polycyclic aromatic radical and a non-condensation polycyclic aromatic radical where aromatic radicals are directly or by a cross-linking member each other linked. Further, X expresses a formula II. That is, flowable polyimide obtained from a special diamine and acid dianhyaride is excellent in heat resistance and has a strong in binding force at a high temperature with a copper foil. |
